Mercurial > projects > ddmd
annotate dmd/CompoundStatement.d @ 177:1475fd394c9e
bug fixes
| author | korDen |
|---|---|
| date | Sun, 10 Oct 2010 10:38:55 +0400 |
| parents | af724d3510d7 |
| children | e3afd1303184 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.CompoundStatement; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Loc; |
| 5 import dmd.Statement; | |
| 6 import dmd.Array; | |
| 7 import dmd.TryCatchStatement; | |
| 8 import dmd.TryFinallyStatement; | |
| 9 import dmd.Catch; | |
| 10 import dmd.ScopeStatement; | |
| 11 import dmd.Identifier; | |
| 12 import dmd.Lexer; | |
| 13 import dmd.ThrowStatement; | |
| 14 import dmd.IdentifierExp; | |
| 15 import dmd.Scope; | |
| 16 import dmd.OutBuffer; | |
| 17 import dmd.HdrGenState; | |
| 18 import dmd.ArrayTypes; | |
| 19 import dmd.ReturnStatement; | |
| 20 import dmd.Expression; | |
| 21 import dmd.InterState; | |
| 22 import dmd.InlineDoState; | |
| 23 import dmd.InlineCostState; | |
| 24 import dmd.InlineScanState; | |
| 25 import dmd.IfStatement; | |
| 26 import dmd.IRState; | |
| 27 import dmd.BE; | |
| 28 import dmd.Util; | |
| 29 | |
| 30 class CompoundStatement : Statement | |
| 31 { | |
| 32 Statements statements; | |
| 33 | |
| 34 this(Loc loc, Statements s) | |
| 35 { | |
| 36 super(loc); | |
| 37 statements = s; | |
| 38 } | |
| 39 | |
| 40 this(Loc loc, Statement s1, Statement s2) | |
| 41 { | |
| 42 super(loc); | |
| 43 | |
| 44 statements = new Statements(); | |
| 45 statements.reserve(2); | |
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46 statements.push(s1); |
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47 statements.push(s2); |
| 0 | 48 } |
| 49 | |
| 72 | 50 override Statement syntaxCopy() |
| 0 | 51 { |
| 52 Statements a = new Statements(); | |
| 53 a.setDim(statements.dim); | |
| 54 | |
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55 foreach (size_t i, Statement s; statements) |
| 0 | 56 { |
| 57 if (s) | |
| 58 s = s.syntaxCopy(); | |
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59 a[i] = s; |
| 0 | 60 } |
| 61 | |
| 62 return new CompoundStatement(loc, a); | |
| 63 } | |
| 64 | |
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65 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 66 { |
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67 foreach (s; statements) |
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68 { |
| 177 | 69 if (s) |
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93
df6d0f967680
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parents:
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70 s.toCBuffer(buf, hgs); |
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df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
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71 } |
| 0 | 72 } |
| 73 | |
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74 override Statement semantic(Scope sc) |
| 0 | 75 { |
| 76 Statement s; | |
| 77 | |
| 78 //printf("CompoundStatement.semantic(this = %p, sc = %p)\n", this, sc); | |
| 79 | |
| 80 for (size_t i = 0; i < statements.dim; ) | |
| 81 { | |
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82 s = statements[i]; |
| 0 | 83 if (s) |
| 84 { | |
| 85 Statements a = s.flatten(sc); | |
| 86 | |
| 87 if (a) | |
| 88 { | |
| 89 statements.remove(i); | |
| 90 statements.insert(i, a); | |
| 91 continue; | |
| 92 } | |
| 27 | 93 |
| 94 s = s.semantic(sc); | |
| 0 | 95 |
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96 statements[i] = s; |
| 0 | 97 if (s) |
| 98 { | |
| 99 Statement sentry; | |
| 100 Statement sexception; | |
| 101 Statement sfinally; | |
| 102 | |
| 103 s.scopeCode(sc, &sentry, &sexception, &sfinally); | |
| 104 if (sentry) | |
| 105 { | |
| 106 sentry = sentry.semantic(sc); | |
| 107 if (s.isDeclarationStatement()) | |
| 108 { | |
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109 statements.insert(i, sentry); |
| 0 | 110 i++; |
| 111 } | |
| 112 else | |
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113 statements[i] = sentry; |
| 0 | 114 } |
| 115 if (sexception) | |
| 116 { | |
| 117 if (i + 1 == statements.dim && !sfinally) | |
| 118 { | |
| 119 static if (true) { | |
| 120 sexception = sexception.semantic(sc); | |
| 121 } else { | |
| 122 statements.push(sexception); | |
| 123 if (sfinally) | |
| 124 // Assume sexception does not throw | |
| 125 statements.push(sfinally); | |
| 126 } | |
| 127 } | |
| 128 else | |
| 129 { | |
| 130 /* Rewrite: | |
| 131 * s; s1; s2; | |
| 132 * As: | |
| 133 * s; | |
| 134 * try { s1; s2; } | |
| 135 * catch (Object __o) | |
| 136 * { sexception; throw __o; } | |
| 137 */ | |
| 138 Statement body_; | |
| 139 Statements aa = new Statements(); | |
| 140 | |
| 141 for (int j = i + 1; j < statements.dim; j++) | |
| 142 { | |
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143 aa.push(statements[j]); |
| 0 | 144 } |
| 145 body_ = new CompoundStatement(Loc(0), aa); | |
| 146 body_ = new ScopeStatement(Loc(0), body_); | |
| 147 | |
| 148 Identifier id = Lexer.uniqueId("__o"); | |
| 149 | |
| 150 Statement handler = new ThrowStatement(Loc(0), new IdentifierExp(Loc(0), id)); | |
| 151 handler = new CompoundStatement(Loc(0), sexception, handler); | |
| 152 | |
| 153 Array catches = new Array(); | |
| 154 Catch ctch = new Catch(Loc(0), null, id, handler); | |
| 155 catches.push(cast(void*)ctch); | |
| 156 s = new TryCatchStatement(Loc(0), body_, catches); | |
| 157 | |
| 158 if (sfinally) | |
| 159 s = new TryFinallyStatement(Loc(0), s, sfinally); | |
| 160 s = s.semantic(sc); | |
| 161 statements.setDim(i + 1); | |
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162 statements.push(s); |
| 0 | 163 break; |
| 164 } | |
| 165 } | |
| 166 else if (sfinally) | |
| 167 { | |
| 168 if (0 && i + 1 == statements.dim) | |
| 169 { | |
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170 statements.push(sfinally); |
| 0 | 171 } |
| 172 else | |
| 173 { | |
| 174 /* Rewrite: | |
| 175 * s; s1; s2; | |
| 176 * As: | |
| 177 * s; try { s1; s2; } finally { sfinally; } | |
| 178 */ | |
| 179 Statement body_; | |
| 180 Statements aa = new Statements(); | |
| 181 | |
| 182 for (int j = i + 1; j < statements.dim; j++) | |
| 183 { | |
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parents:
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184 aa.push(statements[j]); |
| 0 | 185 } |
| 186 body_ = new CompoundStatement(Loc(0), aa); | |
| 187 s = new TryFinallyStatement(Loc(0), body_, sfinally); | |
| 188 s = s.semantic(sc); | |
| 189 statements.setDim(i + 1); | |
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parents:
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190 statements.push(s); |
| 0 | 191 break; |
| 192 } | |
| 193 } | |
| 194 } | |
| 195 } | |
| 196 i++; | |
| 197 } | |
| 198 if (statements.dim == 1) | |
| 199 { | |
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200 return statements[0]; |
| 0 | 201 } |
| 202 return this; | |
| 203 } | |
| 204 | |
| 72 | 205 override bool usesEH() |
| 0 | 206 { |
| 123 | 207 foreach (Statement s; statements) |
| 208 { | |
| 209 if (s && s.usesEH()) | |
| 210 return true; | |
| 211 } | |
| 212 | |
| 213 return false; | |
| 0 | 214 } |
| 215 | |
| 72 | 216 override BE blockExit() |
| 0 | 217 { |
| 218 //printf("CompoundStatement::blockExit(%p) %d\n", this, statements->dim); | |
| 219 BE result = BE.BEfallthru; | |
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220 foreach (s; statements) |
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221 { |
| 0 | 222 if (s) |
| 223 { | |
| 224 //printf("result = x%x\n", result); | |
| 225 //printf("%s\n", s->toChars()); | |
| 226 if (!(result & BE.BEfallthru) && !s.comeFrom()) | |
| 227 { | |
| 79 | 228 if (s.blockExit() != BE.BEhalt && !s.isEmpty()) |
| 0 | 229 s.warning("statement is not reachable"); |
| 230 } | |
| 79 | 231 else |
| 232 { | |
| 233 result &= ~BE.BEfallthru; | |
| 234 result |= s.blockExit(); | |
| 235 } | |
| 0 | 236 } |
| 237 } | |
| 238 | |
| 239 return result; | |
| 240 } | |
| 241 | |
| 72 | 242 override bool comeFrom() |
| 0 | 243 { |
| 244 assert(false); | |
| 245 } | |
| 246 | |
| 72 | 247 override bool isEmpty() |
| 0 | 248 { |
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249 foreach (s; statements) |
| 0 | 250 { |
| 251 if (s && !s.isEmpty()) | |
| 252 return false; | |
| 253 } | |
| 254 return true; | |
| 255 } | |
| 256 | |
| 72 | 257 override Statements flatten(Scope sc) |
| 0 | 258 { |
| 259 return statements; | |
| 260 } | |
| 261 | |
| 72 | 262 override ReturnStatement isReturnStatement() |
| 0 | 263 { |
| 264 ReturnStatement rs = null; | |
| 265 | |
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266 foreach(s; statements) |
| 0 | 267 { |
| 268 if (s) | |
| 269 { | |
| 270 rs = s.isReturnStatement(); | |
| 271 if (rs) | |
| 272 break; | |
| 273 } | |
| 274 } | |
| 275 return rs; | |
| 276 } | |
| 277 | |
| 72 | 278 override Expression interpret(InterState istate) |
| 0 | 279 { |
| 63 | 280 Expression e = null; |
| 281 | |
| 282 version (LOG) { | |
| 283 printf("CompoundStatement.interpret()\n"); | |
| 284 } | |
| 285 if (istate.start == this) | |
| 286 istate.start = null; | |
| 287 if (statements) | |
| 288 { | |
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289 foreach(s; statements) |
| 63 | 290 { |
| 291 if (s) | |
| 292 { | |
| 293 e = s.interpret(istate); | |
| 294 if (e) | |
| 295 break; | |
| 296 } | |
| 297 } | |
| 298 } | |
| 299 version (LOG) { | |
| 300 printf("-CompoundStatement.interpret() %p\n", e); | |
| 301 } | |
| 302 return e; | |
| 0 | 303 } |
| 304 | |
| 72 | 305 override int inlineCost(InlineCostState* ics) |
| 0 | 306 { |
| 307 int cost = 0; | |
| 308 | |
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309 foreach(s; statements) |
| 0 | 310 { |
| 311 if (s) | |
| 312 { | |
| 313 cost += s.inlineCost(ics); | |
| 314 if (cost >= COST_MAX) | |
| 315 break; | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 return cost; | |
| 320 } | |
| 321 | |
| 72 | 322 override Expression doInline(InlineDoState ids) |
| 0 | 323 { |
| 324 Expression e = null; | |
| 325 | |
| 326 //printf("CompoundStatement.doInline() %d\n", statements.dim); | |
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327 foreach(s; statements) |
| 0 | 328 { |
| 329 if (s) | |
| 330 { | |
| 331 Expression e2 = s.doInline(ids); | |
| 332 e = Expression.combine(e, e2); | |
| 333 if (s.isReturnStatement()) | |
| 334 break; | |
| 335 | |
| 336 /* Check for: | |
| 337 * if (condition) | |
| 338 * return exp1; | |
| 339 * else | |
| 340 * return exp2; | |
| 341 */ | |
| 342 IfStatement ifs = s.isIfStatement(); | |
| 343 if (ifs && ifs.elsebody && ifs.ifbody && | |
| 344 ifs.ifbody.isReturnStatement() && | |
| 345 ifs.elsebody.isReturnStatement() | |
| 346 ) | |
| 347 break; | |
| 348 } | |
| 349 } | |
| 350 return e; | |
| 351 } | |
| 352 | |
| 72 | 353 override Statement inlineScan(InlineScanState* iss) |
| 0 | 354 { |
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355 foreach(ref Statement s; statements) |
| 0 | 356 { |
| 357 if (s) | |
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358 s = s.inlineScan(iss); |
| 0 | 359 } |
| 360 | |
| 361 return this; | |
| 362 } | |
| 363 | |
| 72 | 364 override void toIR(IRState* irs) |
| 0 | 365 { |
| 366 if (statements) | |
| 367 { | |
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368 foreach(s; statements) |
| 0 | 369 { |
| 370 if (s !is null) | |
| 371 { | |
| 174 | 372 //writeln(s.classinfo.name); |
| 0 | 373 s.toIR(irs); |
| 374 } | |
| 375 } | |
| 376 } | |
| 377 } | |
| 378 | |
| 72 | 379 override CompoundStatement isCompoundStatement() { return this; } |
| 380 } |